Spark-arrester



UNITED STATES PATENT OFFICE.

JOHN E. wreeiN, or HOUSTON, rExAs.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 224,497, dated February10, 1880.

` Application 1edDeeember19,1879.

To all whom it may concern:

Be it known that I, JON E. WIGGIN, of Houston, in the county of Harrisand State of Texas, have invented certain new and useful Improvements inSpark-Arresters; and I do hereby declare that `the following is a full,

clear, and exact description thereof, reference being had to theaccompanying drawings, vand to the letters of reference marked thereon,which form part of this specification. l

The nature of Vmy invention consists in the construction of aspark-arrester adapted to the smoke-stack of any locomotiva-as will behereinafter more fully set forth. 4

In the annexed drawings, Figure l is a side elevation of a smoke-stackembodying my invention. Fig. 2 is a central vertical section of thesame. Fig- 3 is a bottom view of the sparkarrester. p

A represents the smoke-stack of a locomotive constructed in any of theknown and usual ways, and provided at its top with a cylindrical screen,B, of wire-gauze or other equivalent material, extending downward' intothe stack for a suitable distance. A little below the lower end of thisscreen and in the largest part of the stack is placed thespark-arrester, which consists of a circular plate, C, supported by rodsa c, and of such diameter as to leave a suitable space between it andthe walls of the stack.

The under side of plate or disk Gis provided with two separate series ofradially-curved wings, D D and c e, those marked e e radiating i fromthe center of the plate C, and their outer ends bent to a sharper curvethan their remaining portion. These wings may extend in length almost,if not quite, one-half the distance from the center of the plate to itscircumference, as fully shown in Fig. 3.

The wings D D are curved from their outer startingpointi. e., thecircumference of the plate C-to their inner ends, which terminate alittle beyond and over the curved endsof` f wings e e, thus leavingopenings b b between the inner endsof the outer wings and the outer endsof the inner series. This peculiar arrangement, by producing a partialvacuum, will prevent not only the emitting of black smoke, butv willalso eflectually reduce the larger sparks to a degree from which nodanger may be apprehended.

In the center of the plate C-is an opening covered by a slide orother'valve, F, which, by a rod, d, is connected to a lever, G, to beoperated from the cab by the engineer. When this valve is opened thesmoke will pass directly upward, giving more perfect draftvin damp orfoggy weather in raising steam, 8vo., whenever necessary.

My invention may be applied to the smokestack of any locomotive.V

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a spark-arrester, the combination, with a smokestack, of plate C,having its under side provided with the central curved wings c e andcircumferential curved wings D D, all being constructed and arrangedrelatively to eachother as and for the purposes set forth.

2. The combination, with a locomotive' smoke-stack, of the cylindricalscreen B, plate C, and wings D, having cavities or openings b,substantially as and for the purposes herein set forth.

3. The combination, in a spark-arrester, of the plate C, having itsunder side provided with curved win gs arranged as set forth, with valveF, lever G, and rod d, all constructed as andfor the purpose set forth.

In testimony that I claim the foregoing as my Own I affix my signaturein presence of two witnesses.

` JOHN E. WIGGIN.

Witnesses:

I. BRASHEAR,

ED, DUNN.

